I recommend 1 5/8 inch expanding stem casters with 4 inch wheels for this table. If you order casters that are too big, the table may sit too low. Please see the casters I have attached below.https://www.etundra.com/restaurant-parts/hardware/equipment-casters/sets/commercial-1-five-eighths-inch-expanding-stem-caster-set-with-4-inch-wheels/